Around a Strange Sun

Explore the alien landscape of Earth’s nearest neighbor.

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After decades of failed searches, astronomers from the Pale Red Dot project found a planet around our nearest star, Proxima Centauri. This world, Proxima b, is roughly Earth-sized and nestled in its star’s habitable zone — the region where oceans can exist. But that’s about where the similarities end. Proxima Centauri is a cool, tiny red dwarf star. To stay warm, Proxima b’s orbit is tighter than Mercury’s.
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